<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<header style="background-color:red; width:100%; height:20vh;"></header>
		<div style="background-color: green; width:100%; height:40vh;"></div>
		<footer style="background-color: black; width: 100%; height: 30vh;"></footer>
	</body>
</html>
